Sarah J.Tow d/o Wilson m. John Clark Tex

Sarah Jane Tow married John Clarkabout 1863/64in Texas. Seeking parents/siblings or any proof of any kind on this GGG Grandfather, John Clark b. 1823/24 Georgia or Texas . Is there any information of any kind in any of the Tow bibles/family histories? All I have is 1870 and 1880 census. I would like to know how and where they died. They left 7 orphan children but only names of parents on Guardianship papers. First wife a Fowler , second wife Sarah J. Tow. Can not locate death date or cemetery. (died after June 1880 and before Dec.22, 1884 ) Any information would certainly be appreciated. Feel free to contact me directly at ovranch@msn.com Thanks Cheyrl